I always felt the WBC's problem was corrupting judges, in particular. The IBF just straight out take bribes for their rankings and works "too closely" with promoters.

The WBO is slightly better- but it is seen as the "weaker" major organization. I guess over time it will be more widely accepted.

The WBA is and always will be the organization of standing. It's been around the longest and has a longer track record and less calls on their organization being corrupt. But their champions are always lack-lustre and as of late, the champions are very non-descript.

For some reason the boxing world loves the WBC and IBF Belts. Dunno why?!!?